* Non-edge; merge the two dsf classes on either
* side of it.
*/
- assert(pos < 2*cr*(cr-1));
+ if (pos >= 2*cr*(cr-1)) {
+ sfree(dsf);
+ return "Too much data in block structure specification";
+ }
+
if (pos < cr*(cr-1)) {
int y = pos/(cr-1);
int x = pos%(cr-1);